7. Which of the following is a valid buffer?A. 0.30 M HNO; and 0.30 M NaNO,B. 0.20 M HF and 0.10 M KFC. 0.15 M NaOCN and 0.15 M KCND. 0.15 M HBr and 0.25 M NaBr

Buffers are solutions that do not alter pH when diluted or when tiny volumes of acids or alkalis are…

Answered: 7. Which of the following is a valid…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Which mixture acts as buffer solutions? O 50 ml 0.1M H2CO3 and 100 ml 0.1M NaOH O 100 ml 0.1M H2CO3 and 100 ml 0.1M NaOH O 50 ml 0.1M H2CO3 and 50 ml 0.1M NAOH O 100 ml 0.1M H2CO3 and 50 ml 0.1M NaOH
2. Which of the following is a buffer? Why or why not? Can you give the components responsible for its buffering action? a. Stomach acid b. Blood c. Egg White d. Sea Water e. Bleaching Solution
Augmentin (600mg/5mL) 40 mg/kg/dose po TID. How many milliliters are given with each dose? Weight: 104 pounds, 49 inches. ml/dose? a. 5.7 b. 5.8 c. 16 d. 17
Which of the following can be considered a fluid?1. Water at 20 oC2. Carbon dioxide at 30 oC and 1 atm3. Carbon dioxide at 30 oC and 40 atmA. 1 onlyB. 1 and 2C. 1 and 3D. 2 and 3E. 1, 2 and 3
6. You are administering a dose of IV doxycycline 1% solution for the treatment of canine ehrlichiosis. Due to the irritation to the veins doxycycline infusions can cause, you wish to dilute the dose to a 0.3% solution. How many mililiters of the 1% stock solution must be added to normal saline (0.9% NaCl) to give you a total volume of 3.0 fl. oz?
12. If strong-base anion exchange resin is applied to treat raw water with silicate, the pH of raw water should be A. acidic B. neutral c. basic D. no demanding 13 In electrodialysis process with polarization, fouling layer occurs in the A. concentrate chamber; anion B. concentrate chamber; cation c. dilute chamber; anion D. dilute chamber; cation side of membrane.
I am unsure how to answer question number 2: What volume of 0.100 M HCl would have to be added to this buffering system, to reduce the pH to 7.1?
8. At 100 °C, 1.00 gram of liquid water has a volume of 1.043 mL. What volume will 1.00 gram of water vapor occupy at 100 °C at a pressure of 1.00 bar? What is the percent volume change in the the sample?
A physician request 2.5 L of a35% solution the pharmacy has 12.5% and 45% solution in stock what volume of the 45% and 12.5% solution are needed to fill this order?
6. From the titration curve at the right, determine a. If the acids/bases are strong or weak b. Whether the acid or base was added from the buret c. The volume required to reach the equivalence 13 11 9 pH 7 5 3 1 5 10 15 20 d. The pH of the equivalence point e. The region where buffering occurs f. The volume and pH at the half equivalence point g. The K of the base used Volume added (mL) 25 25 h. The region where the [B]: [BH+] ratio is greater than 1 i. The region where the [B]: [BH+] ratio is less than 1 j. The concentration of acid if the titration started with 50.0 mL of 0.050 M base. k. Suggest a good indicator to use for this titration and explain why.
What is the concentration in % (w/v) of a solution prepared from 50.0 g NaCl and 2.5 L of water? A. 5.0 % B. 2.0 % O C. 0.020 % D. 0.050 % E. 0.50 %
7. Compare the paired concentrations below (given in terms of Molarity (moles/liter), where mM is millimolar and μM is micromolar) and determine which of the values have the higher concentration. a. 0.005M vs. 5,000 mM b. 300mM vs. 3000 μM c. 1M vs. 100,000 μM

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7. Which of the following is a valid buffer? A. 0.30 M HNO, and 0.30M NANO, B. 0.20 M HF and 0.10 M KF C. 0.15 M NaOCN and 0.15 M KCN D. 0.15 M HBr and 0.25 M NaBr